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wip: implement encryption for logfiles
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| #include "crypto.hpp" | ||
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| #include <openssl/evp.h> | ||
| #include <openssl/rand.h> | ||
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| namespace clog::utils { | ||
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| std::string encryptFile(const std::string& password, std::istream& file) { | ||
| EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new(); | ||
| if (!ctx) { | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| const EVP_CIPHER* cipher = EVP_aes_128_cfb(); // You can change the cipher if needed | ||
| unsigned char key[EVP_MAX_KEY_LENGTH]; | ||
| unsigned char iv[EVP_MAX_IV_LENGTH]; | ||
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| if (EVP_BytesToKey(cipher, EVP_md5(), NULL, reinterpret_cast<const unsigned char*>(password.c_str()), password.size(), 1, key, iv) != 16) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| if (EVP_EncryptInit_ex(ctx, cipher, nullptr, key, iv) != 1) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| unsigned char inBuffer[1024]; | ||
| unsigned char outBuffer[1024 + EVP_MAX_BLOCK_LENGTH]; | ||
| int bytesRead = 0; | ||
| int outLength = 0; | ||
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| std::string output; | ||
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| while (file.good()) { | ||
| file.read(reinterpret_cast<char*>(inBuffer), sizeof(inBuffer)); | ||
| bytesRead = static_cast<int>(file.gcount()); | ||
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| if (EVP_EncryptUpdate(ctx, outBuffer, &outLength, inBuffer, bytesRead) != 1) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| output += std::string{outBuffer, outBuffer + outLength}; | ||
| } | ||
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| if (EVP_EncryptFinal_ex(ctx, outBuffer, &outLength) != 1) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
| output += std::string{outBuffer, outBuffer + outLength}; | ||
| EVP_CIPHER_CTX_free(ctx); | ||
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| return output; | ||
| } | ||
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| std::string decryptFile(const std::string& password, std::istream& file) { | ||
| EVP_CIPHER_CTX* ctx = EVP_CIPHER_CTX_new(); | ||
| if (!ctx) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| const EVP_CIPHER* cipher = EVP_aes_128_cfb(); | ||
| unsigned char key[EVP_MAX_KEY_LENGTH]; | ||
| unsigned char iv[EVP_MAX_IV_LENGTH]; | ||
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| if (EVP_BytesToKey(cipher, EVP_md5(), NULL, reinterpret_cast<const unsigned char*>(password.c_str()), password.size(), 1, key, iv) != 16) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| if (EVP_DecryptInit_ex(ctx, cipher, nullptr, key, iv) != 1) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| unsigned char inBuffer[1024 + EVP_MAX_BLOCK_LENGTH]; | ||
| unsigned char outBuffer[1024]; | ||
| int bytesRead = 0; | ||
| int outLength = 0; | ||
| std::string output; | ||
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| while (file.good()) { | ||
| file.read(reinterpret_cast<char*>(inBuffer), sizeof(inBuffer)); | ||
| bytesRead = static_cast<int>(file.gcount()); | ||
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| if (EVP_DecryptUpdate(ctx, outBuffer, &outLength, inBuffer, bytesRead) != 1) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| output += std::string{outBuffer, outBuffer + outLength}; | ||
| } | ||
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| if (EVP_DecryptFinal_ex(ctx, outBuffer, &outLength) != 1) { | ||
| EVP_CIPHER_CTX_free(ctx); | ||
| throw std::runtime_error{"Encryption failed!"}; | ||
| } | ||
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| output += std::string{outBuffer, outBuffer + outLength}; | ||
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| EVP_CIPHER_CTX_free(ctx); | ||
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| return output; | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| #pragma once | ||
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| #include <string> | ||
| #include <istream> | ||
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| namespace clog::utils { | ||
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| std::string encryptFile(const std::string& password, std::istream& file); | ||
| std::string decryptFile(const std::string& password, std::istream& file); | ||
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| } | ||
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